A331881 - OEIS

A331881

a(n) is the first n-digit substring to occur n times in the decimal expansion of the fractional part of Pi.

1, 26, 446, 2796, 86538, 872117, 1591292, 66416662

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OFFSET

1,2

LINKS

EXAMPLE

a(1) = 1, because '1' is the first 1-digit string appearing 1 time (at position 1);

a(2) = 26, because '26' is the first 2-digit string appearing 2 times (at positions 6 and 21);

a(3) = 446, because '446' is the first 3-digit string appearing 3 times (at positions 125, 182 and 217);

and so on.

CROSSREFS

Cf. A331882 (the number of digits needed to find the repeated n-digit strings).

KEYWORD

base,nonn,hard,more

AUTHOR

STATUS

approved